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Ivanshal [37]
3 years ago
12

A 6,000-km undersea glass fiber phone line crosses the Atlantic ocean connecting the US and France. (a) How long does it take fo

r a message to transverse this link? (b) How long does it take for a message to travel from US to France by using a satellite link? The satellite is stationed about 22,000 miles above the earth between the US and France. (c) Will two people having a conversation across these two different links notice the travel delays?
Physics
1 answer:
stiv31 [10]3 years ago
6 0

Answer:

Explanation:

Message will travel through the fibre at the speed of 3 x 10⁸ m /s which is also the speed of light .

a ) Time for a message to travel from US to France by using glass fibre  link

time  = distance / speed

= 6000 x 1000 / 3 x 10⁸

= .02 s .

b )

22000 miles = 1.6 x 22000

= 35200 km

Time for a message to travel from US to France by using a satellite link

time = distance / velocity

 distance = 2 x √ ( 35200² + 3000² )

=  2 x 35327 km

= .7 x 10⁸ m .

time = .7 x 10⁸ / 3 x 10⁸

= .233 s

c )

Difference of time = .233 - .02

= .213 which is more than 1/6 s for which effect of hearing stays in the brain , which is called persistence of vision .  So they will be heard as different sounds.

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Explanation:

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here we know for convex mirror

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while the focal length of the convex mirror is always taken positive

So here we have

\frac{1}{d_i} + \frac{1}{-d_o} = \frac{1}{f}

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so here maximum value of image distance is equal to focal length of the mirror

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3 years ago
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vagabundo [1.1K]

The power that must be delivered to the object by the force is 50 W

Power is defined as the rate of doing work. The power of an object in relation to the force and velocity is given by the following equation:

Power (P) = Force (F) × velocity (v)

P = F × v

From the question given above, the following data were obtained:

  • Force (F) = 10 N
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Thus, the power that must be delivered to the object by the force is 50 W

Learn more on power: brainly.com/question/19539420

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Answer:

when you turn down the volume on the television, you reduce the intensity carried by the sound waves, so you also reduce their amplitude.

Explanation:

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